On May 10, 9:26 am, wrote:
My bathroom faucet has a drip and I traced it to the hot water handle.
Unfortunately, I can't seem to unscrew it because the Philips screw is
stripped.

Assuming as someone else already addressed, that the head is in bad
shape not the threads (unlikely to strip threads in that spot, far
more likely corroded) couple of things to try.

First, soak the threads for a while in vinegar of CLR or one of the
other lime removers -- has a chance to help on some of the corrosion.
Then, the Kroil or similar penetrating oil just might do a little good
if can clean it up first so it has a chance to get somewhere near the
threads.

Then, before buggering up the head any further, get a properly sized
(probably #1, maybe #0) screwdriver bit and put it in a reversible
hammer-drill and if there's any head at all left, chances are pretty
good the impact plus torque will back it out...

If that fails, then the more extreme remedies come into play but I'd
not try them until the above technique fails.